Credibility with a management team isn’t something you arrive with, regardless of your track record elsewhere, and treating your CV as sufficient credibility is one of the more common mistakes new operating partners make in their first few months on a portfolio company. 

What actually builds credibility in the first 90 days is a small number of specific, visible wins on things the management team already cared about before you arrived, not a demonstration of broader strategic capability. 

This is a point worth repeating because it cuts against instinct. The instinct, especially for an experienced operating partner, is to demonstrate range, show the management team the full breadth of what you can help with.

The management team, meanwhile, is watching for something much narrower: can this person actually help with the two or three things that have been genuinely stuck, and will they do it without making the management team feel diminished in the process. 

The sequencing matters more than most people expect. 

Spend the first few weeks primarily listening and asking specific, well-informed questions rather than proposing solutions, even where a solution seems obvious early. 

Management teams that have been burned by previous operating partners are watching closely for whether you’re genuinely trying to understand the business or whether you’ve already decided what the answer is and are just going through the motions of asking. 

Once you’ve identified one or two specific, real problems the management team already recognises as problems, solve those visibly and completely before moving on to anything more ambitious. 

Credibility built this way compounds. 

Credibility assumed on the basis of a strong CV tends to erode the first time it’s tested and found wanting.